Perkasa, V. nanda, Aritonang Djamarel, S. and Hermanto, H. 2022. Modification of the Main Deck of Pc40 Using the Sandwich Plate System to Support Marine Defense Operations. Journal Research of Social Science, Economics, and Management. 1, 7 (Feb. 2022), 767–773. DOI:https://doi.org/10.59141/jrssem.v1i7.88.